Device for heating steam-boilers



DANIEL HESS,

0F TEST UNION,

IOWA.

DEVICE FOR HEATING STEAM-BOILERS.

Specification of Letters Patent No. 24,637, dated July 5, 1859.

To all 'whom it may concern:

Be it known that I, DANIEL HEss, of West Union, in the county of Fayette and State of Iowa, have invented certain new and useful Improvements in Machinery for Generating Steam in Steam-Boilers; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings and to the letters of reference marked thereon.

The nature of my invention consists in constructing and arranging the several parts which will be hereinafter particularly described in the manner set forth.

In the drawings Figure l represents a perspective view. Fig. Q is a longitudinal vertical section. Fig. 3 is an end View.

In the figures A, represents a tight casing made of any suitable material, and in which is placed a steam boiler B, which is provided with one or more fines C, C, as is ordinarily the case. The boiler is made sufficiently smaller than the casing to allow of a passage of air freely around and between them.

F, represents a box secured to the casing A, in which is placed a fan I-I, said fan being made in any of the known ways, to produce a draft.

K, represents a furnace connected to the casing A, in which is placed a stove D, which has a smoke pipe E, leading from it. The furnace and stove may be made of any convenient size and length. I intend them to be large enough to supply a sutlicient amount of heat to answer practical purposes in generating steam in boilers.

J, represents an opening in the bottom of the casing immediately over the stove made from m, to m.

In operating this invention, the boiler being supplied with water, a fire is kindled in the stove D, the smoke passing out through pipe E. As the stove becomes hot, the heated air, from its top and sides,rises and passes between the boiler and the casing. After the air between the boiler and the casing has been well heated, I set the fan I-I, in motion so as to create a draft through the flues toward the fan. The air passes into the fan box and thence out through the aperture I, which leads from said boX to the space between the casing and the boiler, as is indicated by the arrows. By means of this fan the hot air arising from the stove and enveloping the boiler B, is drawn into the flues and then again discharged through the aperture I, so that it will pass back between the casing and the boiler and then into the flues again; thus a continuous current is produced around and around the boiler with the hot air. As the air passes through the aperture I, it comes in contact with the top of the stove and with the hot air arising from its sides, and is thus reheated at every revolution. The hot air accumulates between the boiler and casing and being constantly in the dues and around the boiler a larger amount of steam will be generated in the boiler, than if so much of its surface was not exposed to a current of lively heat.

The fan shaft is provided with a pulley over which a band may pass from the engine for the purpose of giving motion to said shaft.

It is not necessary that the stove should have an independent top, as it may be made to lit snugly up against the bottom of the boiler, which serves as a top for it; in this case the heat of the lire comes in direct contact with the boiler and the hot air rising from the sides of the stove mingles with the draft from the fan. Should the hot air arising from the stove and passing around the boiler cause said boiler to become red hot, I may find it best to run a shaft with arms on it through said boiler, which when revolved will throw water against its top and thus prevent it from ever coming to a red heat.

I may find it necessary or convenient to use two valves in the casing, one for letting out the hot air and the other for allowing an ingress of cold air.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is I. The combination with a steam boiler of the tight external casing A, and fan I-I, for the purpose of producing currents of air around the boiler substantially as set forth.

2. In combination with the subject of the first claim, the stove D, provided with a. smoke pipe E, through which the products of combustion pass while the heat passes into the casing substantially as set forth.

DANIEL HESS.

Witnesses:

C. M.ALEXANDER, T. H. ALEXANDER. 

